Jet propulsion engine



June 24,1952 c J, MCCORMICK JET PROPULSION ENGINE 2 SHEETS-SHEET 1 Filed July 22, 1946 n 00$ 4/ 24 o 4 0 5528 0 M v 85 o l. Z M 1 1g INVENTOR.

ATI'D RN EYE June 24, 1952 c, J, MccoRMlcK 2,601,311

JET PROPULSION ENGINE Filed July 22, 1946 I 2 SHEETS-SHEET 2 INVENTOR.

Patented June 24, 1952 UNITED STATES PATENTIOFFICE JET PROPULSION ENGINE Clarence J. McCormick, Chicago, Ill.

Application July 22, 1946, Serial No. 685,290

(01. Gil-35.6)

2 Claims;

My present invention relates to an improved jet propulsion engine and more particularly to the explosion of a charge of air and gas in a firing chamber, the force of the charge being expelled from the chamber and resulting in a jet or rocket type propulsion.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention according to the best mode I have thus far devised but it will be understood that various changes and alterations may be made in the exemplified structure within the scope of the appended claims.

In the drawings:

Figure 1 is a vertical sectional view of the combustion chamber;

Figure 2 is a top plan view of the chamber closure;

Figure 3 is a bottom plan view thereof;

Figure 4 is a sectional view of the closure;

Figure 5 is a horizontal sectional view of the chamber, the section being taken on the line 5-5 of Figure l;

Figure 6 is a front elevational view of the timer for operating the closure of the combustion chamber; and

Figure '7 is a side elevational view thereof.

Referring now to the drawing wherein like reference characters denote corresponding parts the improved jet propulsion engine of this invention includes a plurality of conical shaped nozzles or combustion chambers each having an outer shell or Wall I32 and an inner shell or wall I34 with the area between the walls filled with asbestos as indicated by the numeral I35, or other suitable material.

An opening I 38 is provided in the small end of the nozzle and this is connected to a tube 38 that extends from the nozzle to means of supplying gaseous fuel.

The nozzle is also provided with a spark plug I40, the inner end of which is positioned in a recess I42 in the nozzle and the connections thereto are provided through a boss I44 on the outer wall with a wire M6 connecting the terminal of the spark plug to a terminal I 48 of a switch having an arm I59. The arm I5!) is pivotally mounted by a pin I 52 on a bracket I54 and a projection !55 extends from the arm and is positioned to be engaged by the cam I22 of the rod I28.

The rod I20 is operated by a disc I08 having a hub IIEI, which is mounted on a shaft I04, and a split cam having sections i l2 and I I6 and having a cam opening with surfaces indicated by the numerals I15, I11, and I18 therein is positioned to coast with an eccentrically mounted roller 88 that is carried by the disc I38 through a pin I19. The upper ends of the cam sections are held by a bolt I IE to a spring I I8-and extensions at the lower end are secured by a bolt II5 to the rod I29.

As illustrated in Figure 6 the spring holds the cam upwardly against the pin I19 of the roller or flange I and with the roller or head of the pin extended over the cam surface the cam is retained against the face of the disc I08. The shaft IE4 is provided with flat sides to definitely locate the disc I08 thereon.

The lower end of the rod I26 is provided with a cam I22 and the rod is pivotally connected by a pin 524 to an arm I25, the outer end of which is attached to a spring arm I28 which is connected by a hinge I353 to the outer wall [I32 of the conical shaped nozzle.

An annular ring I58 provides a closure in the outer end of the nozzle between the inner and outer walls and the edge of the outer wall is flared outwardly as indicated by the numeral I60.

A closure plate I52 with a dome shaped guide or locating element I64 thereon is positioned against the outer end of the inner wall with the dome shaped element, which is secured to the plate by a bolt 6% extended into the nozzle. The closure I62 is supported by a disc I68 on the end of the arm I28 by bolts I10 and springs I12 around the bolts provide a flexible connection between the closure and disc. The disc is secured to the arm I28 by a bolt I'M.

With the parts arranged in this manner gaseous fuel under pressure is supplied intermittently through the tube 38 to the nozzle or combustion chamber and with the current to the spark plug controlled by the cam I22 the charge is exploded and the force of the explosion is directed outwardly through the larger portion of the nozzle or combustion chamber and the force of the explosion is discharged into the air through which a vehicle in which the device is installed is traveling whereby a jet or rocket-type of propulsion is provided.

After each explosion the closure IE2 is immediately returned to a closed position on the end of the nozzle or combustion chamber and another charge is set up in the chamber.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

l. A nozzle for jet propulsion engines comprismg a double wall elongated conical shaped ca'sing having an inner wall and an outer wall and in which the small end thereof is closed, the large end of said casing being open, a charge inlet connection extended into the small end of the casing and communicating with the interior thereof, a closure plate extended across the large open end of the inner wall of the casing, a disc spaced from the closure plate, bolts connecting the plate to the disc, springs on the bolts urging the disc and plate apart, a centrally disposed dome shaped element mounted on the closure plate and positioned to nest in the large open end of the casing, an arcuate arm hinged to the outer wall of the casing at one end and positioned with the opposite end mounted on the disc of the closure plate, a spark plug positioned in the wall of the nozzle casing, and means opening the closure plate and completing a circuit to the spark plug to produce a spark in the nozzle.

2. In a jet propulsion engine, the combination which comprises an elongated conical shaped nozzle closed at the small end and in which the, large end is open, a closure positioned in the open end, an arcuate arm hinged at one end to the wall of the nozzle and positioned with the op- 4 posite end extended over and spaced from the closure, resilient means carried by the end of the arm spaced from the closure for urging the closure against the end of the nozzle, igniting means in the nozzle, means actuating the igniting means and opening the closure simultaneously, and control means suppling charges of gas intermittently to a combustion chamber in the nozzle.

CLARENCE J. MCCORMICK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 982,540 Skouses Jan. 24, 1911 1,856,552 Hadamik May 3, 1932 2,074,437 Snyder Mar. 23, 1937 2,399,587 Vincent Apr. 30, 1946 FOREIGN PATENTS Number Country Date 3,561 Great Britain Aug. 16, 1881 

